Boron tribromide → HCID 22292839, compound

Participants

Reaction Steps

A solution of N-trifluoroacetyl-8-bromo-1,4-dimethyl-7-methoxy-2,3,4,5-tetrahydro-1H-3-benzazepine (0.383 g, 1.01 mmol) in dichloromethane (30 mL) was treated with BBr3 (2.35 mL of a 1.0M solution in CH2Cl2, 2.35 mmol) and stirred overnight while warming to 20 C. The excess BBr3 is quenched with water, and the resulting mixture was diluted with ether (100 mL), washed with saturated aqueous Na2CO3 (50 mL) and brine (50 mL), dried with Na2SO4 and concentrated. Flash chromatography (15% EtOAc in hexane, silica) resulted in 0.302 g of a white solid. 1H NMR (400 MHz, CDCl3, mixture of rotamers) d 7.22 (m, 1 H), 6.77 (m, 1 H), 5.34 (s, 1 H), 4.35 (m, 1 H), 3.62 (m, 1 H), 3.24 (m, 1 H), 3.13 (m, 2 H), 2.69 (m, 1 H), 1.31 (m, 3 H), 1.22 (m, 3 H).

Provenance & Evidence